Hi all,I have reached at " Build Ubuntu Rootfs via a Pre-built Image ". I have chooses " Armbian_5.27_S9xxx_Ubuntu_xenial_3.14.29_mate_KODI_20170702.img ".While i building root file system, Some errors are shown after executing the Step which is given below

root@Cinesoft-Electronics-dept:/home/cinesoft/project/khadas/ubuntu# xdg-open archives/Armbian_5.27_S9xxx_Ubuntu_xenial_3.14.29_mate_KODI_20170702.img.xzWarning: unknown mime-type for "archives/Armbian_5.27_S9xxx_Ubuntu_xenial_3.14.29_mate_KODI_20170702.img.xz" -- using "application/octet-stream"Error: no "view" mailcap rules found for type "application/octet-stream"Opening "archives/Armbian_5.27_S9xxx_Ubuntu_xenial_3.14.29_mate_KODI_20170702.img.xz" with Disk Image Writer (application/x-raw-disk-image-xz-compressed)file:///home/cinesoft/project/khadas/ubuntu/archives/Armbian_5.27_S9xxx_Ubuntu_xenial_3.14.29_mate_KODI_20170702.img.xz does not appear to be a regular file